##### 25.1.4.5 Specifying a collection-type attribute for each topic type

To specify a collection-type attribute for a topic type in a DITA2Go-generated relationship table for a chapter map:

    [DITARelGroups]
    ; DITA type name = collection-type attribute to use in the <colspec>
    ;  for the chapter map <reltable> column for that DITA type.
    topictype = colltype

To specify a collection-type attribute for a topic type in a relationship table for a book map:

    [DITARelBookGroups]
    ; DITA type name = collection-type attribute to use in the <colspec>
    ;  for the book map <reltable> column for that DITA type.
    topictype = colltype

If you do not include a setting for a topic type in [DITARelBookGroups], DITA2Go uses the setting for that topic type (if any) in [DITARelGroups] for the relationship table for the book map.

We suggest the following collection-type attributes; however, you can specify others:

family | (equivalent to the usual ALink behavior)
sequence | (links are in order of appearance in the chapter)
choice | (processor dependent)

The default is no collection-type, so that topics in that column do not link to each other, but only to topics in other columns in the same row.

For example:

    concept = family
    task = sequence

These settings would yield the following results:

- Concept topics would link to other concepts, and to task and reference topics in the same row (same DITARelRow value; see §25.1.4.3 Adding ALink rows to relationship tables).
- Task topics would link to each other as an ordered set, and to concept and reference topics normally.
- Reference topics would link to tasks and concepts in the same row, but not to each other.

Previous Topic: 25.1.4.4 Specifying one-way linking for a topic in a relationship table

Next Topic: 25.1.5 Providing navigation aids in ditamaps

Parent Topic: 25.1.4 Adding relationship tables to ditamaps

Sibling Topics:

25.1.4.1 Understanding how DITA2Go creates relationship tables

25.1.4.2 Excluding the ALink column from relationship tables

25.1.4.3 Adding ALink rows to relationship tables

25.1.4.4 Specifying one-way linking for a topic in a relationship table